Class FilterHelper


  • public final class FilterHelper
    extends java.lang.Object
    • Field Summary

      Fields 
      Modifier and Type Field Description
      private static java.util.Set<java.lang.String> ALLOWED_FILTERS  
    • Constructor Summary

      Constructors 
      Modifier Constructor Description
      private FilterHelper()  
    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static void isAuthorizedFilter​(PreflightContext context, java.lang.String filter)
      This method checks if the filter is authorized for the PDF file according to the preflight document specification attribute.
      static void isAuthorizedFilterInPDFA​(PreflightContext context, java.lang.String filter)
      This method checks if the filter is authorized for a PDF/A file.
      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    • Field Detail

      • ALLOWED_FILTERS

        private static final java.util.Set<java.lang.String> ALLOWED_FILTERS
    • Constructor Detail

      • FilterHelper

        private FilterHelper()
    • Method Detail

      • isAuthorizedFilter

        public static void isAuthorizedFilter​(PreflightContext context,
                                              java.lang.String filter)
        This method checks if the filter is authorized for the PDF file according to the preflight document specification attribute. For example according to the PDF/A-1 specification, only the LZW filter is forbidden due to Copyright compatibility. Because of the PDF/A is based on the PDF1.4 specification, all filters that aren't declared in the PDF Reference Third Edition are rejected.
        Parameters:
        context - the preflight context
        filter - the filter to check
      • isAuthorizedFilterInPDFA

        public static void isAuthorizedFilterInPDFA​(PreflightContext context,
                                                    java.lang.String filter)
        This method checks if the filter is authorized for a PDF/A file. According to the PDF/A-1 specification, only the LZW filter is forbidden due to Copyright compatibility. Because of the PDF/A is based on the PDF1.4 specification, all filters that aren't declared in the PDF Reference Third Edition are rejected.
        Parameters:
        context - the preflight context
        filter - the filter to check